Nothing
apropos("^as\\.")[1:10] # just a small sample
# convert numbers to strings (this drops attributes)
as.character(xm)
# convert matrix to vector
as.vector(xm)
as.logical(xm)
alpha <- c("a","1","b","0.5")
mode(alpha)
as.numeric(alpha) # can't do the coersion, so NAs are introduced
as.integer(alpha) # notice coersion of 0.5 to 0
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